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Tungsten grain separation during initial stage of liquid phase sintering
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Ceramics.ORCID iD: 0000-0003-0864-3679
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Processing.
2008 (English)In: Powder Metallurgy, ISSN 0032-5899, Vol. 51, no 4, 343-349 p.Article in journal (Refereed) Published
Abstract [en]

The initial stage, the first few seconds of liquid phase sintering has been investigated in experiments using a tungsten heavy alloy with low tungsten content. The heavy alloy has been melted in a temperature gradient for short periods, similar to 9 s in an ellipsoid mirror furnace. During the liquid phase sintering at about 1470 degrees C, a penetration followed by a remarkably rapid separation and dispersion of the tungsten grains by the molten matrix occur. The suggested explanation for this grain separation and dispersion is based on the effect of composition gradients in the liquid matrix and a theory based on interagglomerate melt swelling due to a Kirkendall effect.

Place, publisher, year, edition, pages
2008. Vol. 51, no 4, 343-349 p.
Keyword [en]
Liquid phase sintering, Heavy metal, Particle composites, Tungsten, Agglomerate separation, Kirkendall effect, diffusion, penetration, growth
Identifiers
URN: urn:nbn:se:kth:diva-18149DOI: 10.1179/174329008x293732ISI: 000263029100029Scopus ID: 2-s2.0-65549145046OAI: oai:DiVA.org:kth-18149DiVA: diva2:336195
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Eliasson, Anders

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